Search Results for: mutations

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2,444 results

2,444 results for: mutations

  1. DNA-cutting enzyme looks like scissors

    One type of restriction enzyme not only cuts a DNA strand but also looks like a pair of scissors.

    By Jessa Netting
  2. Health & Medicine

    Immunity’s Eyes

    Proteins called toll-like receptors allow human immune cells to detect microbes.

    By John Travis
  3. Health & Medicine

    Berry Colorful Nutrition News (with recipes)

    Ah, raspberries. So sweet, so delicate on the tongue, so ephemeral. Oregon Raspberry and Blackberry Commission Isolated pigments from the four raspberries tested. Liu/Cornell Oregon Raspberry and Blackberry Commission Every year, I unsuccessfully defend my raspberries against squirrels, birds, and beetles. As I watch the fruit begin to ripen, so do the neighborhood creatures. Two […]

    By Janet Raloff

  4. Genetic search for an equine Eve fails

    Genetic analysis suggests an unusual history for modern horses: lots of independent domestications instead of the usual few.

    By Susan Milius

  5. A More Perfect Union

    Forsaking life in the outside world, endosymbiotic bacteria of some insects traded freedom and nutrients for life inside a cell.

    By Jessa Netting
  6. Health & Medicine

    Genetically altered cells ease hemophilia

    A gene therapy using skin cells that are genetically modified to make clotting proteins, multiplied in a lab, and reinjected into a person eases some bleeding in patients with severe hemophilia.

    By Nathan Seppa

  7. Dolly Was Lucky

    Scientists studying the data on animal cloning argue that cloning a person would be unsafe.

    By John Travis

  8. Telltale Heart

    Genetics is revealing the first steps in building a heart—the organ that is first to develop, subject to the most birth defects, and difficult to heal when damaged later in life.

    By Jessa Netting

  9. RNA world gets support as prelife scenario

    Scientists tinkering with a chemical now vital to life think they've recreated one of the central molecules that gave rise to the chemistry of life.

    By Jessa Netting

  10. Huntington’s protein may be kidnapper

    An abnormal protein associated with Huntington's disease kills cells by stealing another protein needed for cell survival.

    By Jessa Netting
  11. Health & Medicine

    Gene stifled in some lung, breast cancers

    The silencing of a gene called RASSF1A appears to increase the risk of cancer, studies of lung and breast tumors show.

    By Nathan Seppa

  12. Mutation Causes Rare Gum Disease

    By Science News